PLLs generate an output signal that is phase-synchronized to an input signal. They are widely used in telecommunication, radio, and computer systems. One place we commonly find PLLs is the frequency multiplier circuit inside microcontrollers. The PIC 18F2550 used in the IR Toy has one that multiplies a 20 MHz crystal input to 96 MHz needed for the USB module.
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One Response to “Phase Lock Loops 101 with Bil Herd”
Edward Mallon: I've managed to get cheap thermistors calibrated to about to +/- 0.2C with 3.3v Arduinos. https://edwardmallon.wordpress.com/2017/04/26/calibrating-oversampled-thermistors-with-an-arduino/ Instead of playing whack-a-mole with the various sources of...
Ja: What the keyer do? Sends random morse code or there is some input? If someone can point me to some source to read I would...